North American retailer NCIX listed two factory-overclocked NVIDIA GeForce GTX 680 graphics card models. NCIX did not list these two for pre-order, but enabled "Add to Wishlist", which probably notifies those with the product in their wishlists of when they are in stock. Both cards are priced at US $578.20 (incl. free shipping to contiguous US states). The clock speeds of MSI's card, which carries the part number "N680GTX-PM2D 2GD5/OC" was revealed to be 1056 MHz (core) with 6 GHz (GDDR5 effective memory); while those of EVGA's card, which carries the part number "02G-P4-2682-KR", were not revealed. We know from its clearly-mentioned brand extension "SuperClocked", that it's factory-overclocked.

We'll have to see if that 1056Mhz means: that's it's top clockablity number when Adaptive V-Sync max's out for a few milisecond (as needed) to alter and maintain frame-rate transitions to be "fluid and/or organic".

some sources claim that nvidia AIB parters have received a new price(499$) for the 680 from nV, but no word on official RRP/MSRP yet..
apparently this further reaffirms the fact that gk104's price was initially set based on 7970, and in reality it could be sold for lesser, ie, nV has decent margins to tinker with..